I currently run a website with WordPress. I'm redesigning my current website with a new theme and changes of some plugins and urls.
Currently I made a total site copy and installed the new theme and started editing this version on a temporary url.
The problem is: I come from the sahifa theme which creates some extra fields and settings per post / page / media which isn't used by my new theme (generatepress).
How can I copy all posts / pages / media and their settings to a new wordpress installation without copying all 'junk' created by the sahifa theme?